When I was booking a flight from Porto to Barcelona, I weighed the possibility of flying nonstop on Vueling at half the cost of the IB flight connecting in Madrid. The scathing reviews on Vueling told of many horrors with abrupt cancellations and numerous accounts of lost baggage.
I choose IB and guess what...I had to wait 3 hours for one of my 2 checked bags to arrive. It caused me to have to pay a €25 late check in fee at my AirBnB.
There was no kiosk checkin at OPO, even though several other airlines allowed it (including Vueling). Instead there was a long line waiting to checkin at the IB ticket counter. We waited, while watching the 2-4 IB agents sitting at there stations, laughing and visiting with each other. They totally ignored their waiting passengers.
Both of our flights were rather short but the only way to get a soda, coffee or even a cup of water was to pay.
I guess I am just spoiled by American Airlines excellent customer service. Even on most short hops they at least serve complimentary beverages and a bag of pretzels or nuts or a Biscoff cookie.

The flight was comfortable and somewhat empty. So there were middle aisle sections without any passengers. One of the flight attendants was kind enough to let me wife know upon boarding which aisles were empty for her to capture a row of 4 seats so that she could stretch out on the trans-Atlantic flight segment.

Received abysmal service from Iberia. Drinks service on an 11 hour flight in premium consists of exactly one tiny bottle of water. I missed my connecting flight due to a delay, and was not able to get access to the service desk because business class customers always get priority and customer processing at the desk was excruciatingly slow. In addition, I was forced to check in my carry on bag which I got back with damage. After getting home I filed complaints and tried to get in touch via social media but never got any response. Never again.

I heard so much bad about this company, and I think they have a lot worse reputation then they deserve! I totally recommend. Good service, good food and they was on time! Flew from São Paulo - Madrid - Oslo.

I have given 3-stars because my review is mixed. The first leg of our flight was wonderful. The plane was comfortable. The service was excellent.Iberia is very organized. I like the way they send you emails and texts letting you know your gate, etc. It keeps things running very smoothly. We flew economy, which means they charged extra for checked baggage. So just factor that in when booking. However, the flight from Madrid to Paris was terrible. I have never seen seats on an airplane that close together. I am only 5'5" tall and my knees touched the seat in front of me. Plus they misplaced my bags and kept sending me to different belts. I went to the service desk and they basically offered no help. I finally spotted them myself on yet a different belt.